I have a Club Room in TrackMania 2020

What server and map settings should I use to have a multi-lap track where each lap resets the time and fastest lap wins? I don't want standing respawn for each lap, but a continuous run. Like time attack in gokart or qualifying in motorsport.

Is it then also possible to have a Leaderboard for fastest time on the left side, like in normal time attack?

I currently have gamemode: Laps, infinite laps. It seems to arrange players for fastest combined time, not fastest lap. Also there is no leaderboard.

Thanks!

Try using the TimeAttack mode and set the number of laps setting to 0. I believe a value of -1 will use the number of laps the author validated the track with, a value of 0 will use infinite laps, and any positive value will force that value of laps.